> For the complete documentation index, see [llms.txt](https://navixy.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://navixy.com/docs/user/guide/events-and-notifications/device-connection/gsm-jamming.md). # GSM jamming Detect and get alerted when GSM cellular signals are jammed on a GPS tracking device, preventing real-time data transmission to the platform. GSM jamming refers to the disruption of GSM signals (mobile or cellular signals) due to interference from nearby sources. This interference, often called masking or frequency masking, can prevent mobile devices from connecting to mobile networks, affecting services such as mobile data (2G, 3G, 4G, LTE), text messaging, and voice calls. In the context of GPS tracking, GSM jamming can lead to the loss of real-time data communication, making it crucial to have detection rules in place. For example, a logistics company using GPS-equipped vehicles to transport valuable cargo relies on GSM signals for real-time location tracking. If GSM jamming occurs, these signals are disrupted, potentially compromising the security of the shipments. By implementing rules to detect GSM jamming, the company can receive immediate alerts, allowing for swift action to protect their assets. ## Rule settings This rule is entirely dependent on the device's capabilities and hardware configuration. There are no specific settings to configure within the rule itself. For common settings, see [Rules and alerts](/docs/user/guide/events-and-notifications.md). ## System operation details * **Reset timer:** The **GSM jamming** alert has a 5-minute reset timer, meaning the alert doesn't trigger more frequently than once every 5 minutes. If an event occurs during the reset period, it is omitted by the Navixy platform and isn't included in reports. * **Multiple devices:** Users can select multiple GPS devices to monitor under this rule. The only requirement is that the selected GPS devices must support GSM jamming events and be integrated with the platform. This flexibility allows users to monitor this event type across various vehicles or devices conveniently. * **GPS-independent event alert:** The platform registers and displays the event even if it is received in a message without valid GPS coordinates. This ensures that users are informed of the event, regardless of location data. The Inside/Outside radio button settings for geofences are ignored in these cases, as the platform prioritizes displaying potentially critical events. ## See also * [GPS jamming](/docs/user/guide/events-and-notifications/device-positioning/gps-jamming.md) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://navixy.com/docs/user/guide/events-and-notifications/device-connection/gsm-jamming.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.